Re: [ANNOUNCE] mdb-2.6.27-rc2-ia32-08-07-08.patch - Kernel

This is a discussion on Re: [ANNOUNCE] mdb-2.6.27-rc2-ia32-08-07-08.patch - Kernel ; Jeff, This definitely looks interesting and it even worked for me - breaking in couple of times, trying various commands and resuming back to X all works. Never tried a kernel debugger before but most things were obvious after I ...

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Thread: Re: [ANNOUNCE] mdb-2.6.27-rc2-ia32-08-07-08.patch

  1. Re: [ANNOUNCE] mdb-2.6.27-rc2-ia32-08-07-08.patch

    Jeff,

    This definitely looks interesting and it even worked for me - breaking
    in couple of times, trying various commands and resuming back to X all
    works. Never tried a kernel debugger before but most things were
    obvious after I figured out that I need to be on the VT to be able to
    press break and be dropped into the debugger.

    That said, it triggers soft lockups on all the suspended CPUs - not a
    big deal and probably expected, but I guess that can be cured by
    touching the soft lockup watch dog or something?

    Thanks

    Parag
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  2. Re: [ANNOUNCE] mdb-2.6.27-rc2-ia32-08-07-08.patch

    > Jeff,
    >
    > This definitely looks interesting and it even worked for me - breaking
    > in couple of times, trying various commands and resuming back to X all
    > works. Never tried a kernel debugger before but most things were
    > obvious after I figured out that I need to be on the VT to be able to
    > press break and be dropped into the debugger.
    >
    > That said, it triggers soft lockups on all the suspended CPUs - not a
    > big deal and probably expected, but I guess that can be cured by
    > touching the soft lockup watch dog or something?


    Yep.

    It does with this kprobes interface, I noticed it last night. I will run
    this down. I am touching the watchdog in the keyboard handler.

    Jeff

    >
    > Thanks
    >
    > Parag
    >



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  3. Re: [ANNOUNCE] mdb-2.6.27-rc2-ia32-08-07-08.patch

    >> Jeff,
    >>
    >> This definitely looks interesting and it even worked for me - breaking
    >> in couple of times, trying various commands and resuming back to X all
    >> works. Never tried a kernel debugger before but most things were
    >> obvious after I figured out that I need to be on the VT to be able to
    >> press break and be dropped into the debugger.
    >>
    >> That said, it triggers soft lockups on all the suspended CPUs - not a
    >> big deal and probably expected, but I guess that can be cured by
    >> touching the soft lockup watch dog or something?

    >
    > Yep.
    >
    > It does with this kprobes interface, I noticed it last night. I will run
    > this down. I am touching the watchdog in the keyboard handler.
    >
    > Jeff



    Reproduced it. It just spits out the noisy message but the system
    continues and the processors resume running. This is is an esoteric
    issue, but I will run it down. It does not happen on kernel versions
    prior to 2.6.26.

    Jeff

    >
    >>
    >> Thanks
    >>
    >> Parag
    >>

    >
    >
    >



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